Ho missed this one Amjad. Sorry ya..This helps him.
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1. Complaint/suggestion can be registered at 8121281212 by sending an SMS
2. In response, an automated acknowledgement with a unique ID will be sent as an SMS
3....
more... With the unique ID, passenger can know the status of the complaint by sending SMS:-
"STATUS < SPACE > < REFERENCE ID>"
to 8121281212